Chemist could work as a job. I imagine its gimmick would be to "amalgamate" potions for different healing effects and buffs but it also can use potions exclusively. Examples of some skills:
Amalgamate = combine two potions for enhanced effect. Duration 5 secs. Recast 30 sec.
Hi-Potion = Restore target HP 200 potency and Regen. Instant. Recast 2.5 sec Duration 15 sec.
Max Potion = Restore target HP 800 potency. Instant. Recast 60 sec, 2 charges.
Elixir = Restore HP of self and nearby party members 200 potency. Instant. Recast 2.5 sec.
Remedy = 300 potency shield. Instant. Recast 2.5 sec
Eye Drops = Restore target Hp 200 potency. Removes Blind. Instant. Recast 2.5 sec. Effect changes when under Amalgamate.
Hi-Ether = restore MP. Duration 20 sec. Recast 90 sec
Amalgamate combinations:
-Hi-Potion + Elixir = 500 potency aoe heal + regen (15 sec)
-Max Potion + Eye Drops = 800 potency heal + 5% crit up (15 secs)
-Elixir + Remedy = 500 potency aoe heal + shield
-Hi-Ether + Elixir = Mp restoration + Mp regen aoe
If they are going to take inspiration from FFT I also hope they use a satchel or bag as their weapon. Im sure many players will flock to the class just to have a bag/purse as part of their glamour. I also imagine the potions are all instant but the act of amalgamating them would require a cast time. Chemist would be the most mobile healer due to the instant nature of potions.